497 1 f497_supp.htm MFT 497 XBRL DTD 11-27-12 EATON VANCE MANAGEMENT

Eaton Vance Management

Two International Place

Boston, MA  02110



November 27, 2012

Securities and Exchange Commission

100 F Street, NE  

Washington, DC  20549

Attn:  Office of Filings, Information & Consumer Services


Eaton Vance Mutual Funds Trust (the “Registrant”) (1933 Act File No. 002-90946)

on behalf of Eaton Vance Low Duration Fund (the “Fund”)

Ladies and Gentlemen:

On behalf of the Registrant and pursuant to Rule 497(e) under the Securities Act of 1933, as amended, attached for filing are exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information in a supplement dated November 13, 2012 to the Prospectus dated March 1, 2012 of the Fund.  The purpose of the filing is to submit the 497(e) filing dated November 13, 2012 in XBRL for the Fund.

If you have any questions concerning the foregoing, kindly call the undersigned at (617) 672-8535.

Very truly yours,

/s/ Linda Nishi

Linda Nishi